Belker 36W Universal 3V 4.5V 5V 6V 7.5V 9V 12V AC DC Power Adapter Supply for Household Electronics Routers TV Boxes LCD CCTV Cameras - 0.5A 1A 1.5A 2A 2.5A 3A 2500mA Max.

I've only used this as a 12v adapter and haven't found a need for anything lower, but appreciate the flexibility.The Belker adapter is a little expensive compared to other 12v adapters, but it's rated up to 3A, which is not as common (I've accumulated a lot of 1.0/1.5/2.0A 2.1/2.5/5.5mm adapters over the years), and gave me more headroom for the power draw of my intel nuc.Now 4 years later, I needed a 1.7/4.0mm 12v barrel adapter for an aruba instant access point, and this came right in handy-- just change the tip.

I bought this to replace the power supply for my htc vive light houses on my VR setup. The adapter came with many tips. 2 of them seemed to fit the vive light houses I picked one, used the included tool in the adapter bag to turn the voltage up to the proper voltage which I believe was the max setting. plugged it in a couple seconds later my light house powered up and my VR setup worked again!! cheaper than the oem power brick for these things only con is the power cord is pretty short, I had to zip tie the power brick more than half way up the stands for the light houses, my light houses mount on top of the tripod stand about 6.5-7 feet high. It would be much better if the cable length was an extra 5 feet long or so but I am not removing a star for it.

I got this as a replacement for frayed OEM charger.It works as advertised. Setup was easy, there are plenty of plugs fittings of different sizes and tool to adjust voltage is included.Few tips:- make sure tip will fit in the device.- make sure you set voltage to proper level - orange ARROW must point in direction of desired voltage.- charger WATTAGE (AMPERES x VOLTAGE) must be AT LEAST what device requires i.e. if your device draws 30 Watts, charger should be AT LEAST 30 Watts (preferably more) or it will overheat and fail, possibly starting fire!

This was necessary to power some outdoor speakers which weren't coming up in searches. They all had different power and port requirements, and this met those requirements in every situation.However, there are some problems which you need to consider before purchasing. First, the dial is key-based. The key will not stay in place, so you will have to either keep track of it or use a screwdriver to change the power setting. This isn't a big deal to me (I will rarely need to change it), but it could be easier to change, so it's worth noting. Second, the L-shaped plugs aren't always going to fit. Make sure the port isn't too deep or these plugs may not fit all the way into the hole. I got lucky on that second issue but just barely. A straight plug would have probably worked better in that situation, but oh well.Overall, good purchase, will buy another one in the near future, when the need arises.

Amazing

The power adapter is easy to use and a good buy. However, you will need to turn the dial on the adapter with a screwdriver to 12v. Otherwise it will not work. Turning the dial to 12v is a simple task to do. Once done, it works well and will meet your needs.

I bought this exact same converter a few months ago. It was able to handle a wide range of voltages and plug types and importantly it was able to handle either positive center or negative center by simply switching the way that the tip plugged into the adapter cable. This is what I expected when I purchased the same item again.Now when the new one arrived I found that it will only handle positive center without purchasing an additional convertor from their store. This is completely unacceptable for a product that claims to be a "Universal" adapter. I will not purchase this particular power adapter again since there are a wide range of this type of product available that do not suffer from this obvious deficiency.

With the 4.5 V setting I'm seeing 5.1 V output on a calibrated voltmeter. 3 V setting produces 3.8 V. So if your needed voltage level accuracy is critical you'll need to use a regulator circuit of some sort.